Method of making vibrator-bodies.



G. B. FICKOP.

METHOD OF MAKING VIBRATOR BOD|ES.'

APPLICATION FILED nEc.2|, I916.

FP'Z i v N d I b 5/5 5 3% 54 1,263,470 Patented June 4,1918.

, pair i one enonen B. onor, OF NEW Haven, oomvncricur, AssIenoa'ro THEMALLEABLE anon rr'r'rrnes COMPANY,'OF snnnnonn'connnericnr, Acomzone'rronor" cons ecification of Letters Batent.

METHOD MAKING? VIBRAT OR-BODIES.

PatenteolJ 11116.4, 1918.

original application fil ed August 21, 1915, Seria1 1 To. 46,?11.pivided and this application filed December 21, 19 16."Seria1No.138,210.

To all whom it may concern:

Be "it known that L'GEORGE Pronor, a citizen of the United State s,'residing in the city and county of New Haven, State of Connecticut, haveinvented certain new and useful Improvements in Methods of MakingVibrat0r-Bodies, of which; the followis'a full, clear, and exactdescription.

invention relates to percussive tools and more particularlyto'vibratorsof the reciprocating piston type used'in the molding art forffacilitating the reniovalof the pattern; These vibrators are usuallyactuated by compressed air and theirconstruction is such tliatthepistonis rapidly reciprocated when and so long as'the'vibraton is placedin free communication with"the source of a large number of myimproved'vibrators may be produced in a relatively shorttime at avery'low' cost. a

I also aim to improve the general construction and operation of devicesof "the class to which the invention relates.

WVi'th these and other objects inview the invention consists in thenovel features, steps and combinations of parts to'be hereinafterdescribed and claimed In the accompanying drawing,

Figure 1 is a s ide elevationof a vibrator embodying my inventionshowing the means for attaching the same to the pattern board; Fig. 2 isa top plan view"o'fjthe parts shown in Fig. 1'; i

Fig. 3 is a'section on line 3 3, Fig. 1; and Figs. l, 5', 6 and 7 aresections 011 lines 4-4, 5+5, 6--6,, and 7-7otFigl 1.

n; the form shown the vibrator has a side; and'the thicker cylinder wall1'0 is used as a sort ofai'r chestjinwhich the air passages "forconnecting the cylinder" with the source of'conipressed air arefformed.Iheair chestlO ns of less length than'the vibrator body 10 owingto thefact thatthe ends of the latter are reduced and formed as cylindricalextensions 15in line withfthe cylinder 11. 'The cjaplil is screwedinto'a threaded socket in one ot'the'extehsioiis l5 and the cap 13 isscrewed into a threaded soclfret the other-cylinder extension, the capsbeing preferably interchangeable. Preferably the caps 12, 13 are anfrombar stock the case illustrated a hexagonal barof somewhat lessdiameter than the body 10); andfthe cap or 113 has its head out mayatpneside [to form a notch lb, adapted to seat on th'e edg e of th'e' patternboard 17 in the manner shown. Y At the opposite side of the 'heaclofthe"plug ,13 a

smallernotch 18, is formed which serves as a seat fora nut 19.

a A bolt 20, having" a screw head 21, is passed through'a hole22, cutin' 'the pattern board, and an alined hole 23, pa ssing transverselythrough the head of the'plu'g 13and communicating with the respectivenotches 161K181 This bolt'22,'e11- the nut 19, and'as the'latter ispreor fitting in communication with the pressure source (not shown);Passages 25, 26 lead from the port 24, (at points adjacent the bottom ofsaid port or pocket) to ports 27,28,,in"the'cylinder wall, and theselatteraports are adapted to communicate by means of annular grooves, 29,39 on the piston 14, with ports 31, 32. The port 31,

32 enable air to pass out of the cylinder" ducts or' passages 33, 34respectively which communicate with ports 35, 36 at the respective endsof the cylinder 11. The piston 14 is provided with end stops 14, 14which are so formed as to prevent the ends of the cylinderjfrom beingclosed off, and a spring 14 acts on thepiston in such a manner as tonormally hold the'latter against one end of the cylinder. Near therespective ends of the cylinder a plurality of exhaust ports 37,38 arecut in the thin wall 10*.

. The normal position of the piston is hown port 27. However, when thepiston moves to the left the port 27,,is opened as soon as the groove29, comes into line with it and communication is then establishedthrough port 31, duct 33 and port 35 with the lefthand end of thecylinder so that the piston is thrust to the right. The exhaust takesplace through the ports 37, 38 in the usual manner, and a rapidvibration is kept-up until the air supply is cut ofl. The spring 14normally holds the piston in such a position that it will begin tovibrate at once. The piston is reversible and the spring 14 may be usedat either end of the cylinder.

In manufacturing an improved vibrator of the type shown, I take ahexagonal bar preferablyof steel and at suitable points out it down toform the reduced cylindricalextensionsor portions 15. Preferably anumberiof thevibrators will be made at once and the eccentric portionsformed byturning will be twice the width of the portion 15,

so that by cutting off the bar at the centers ofthe severalcylindricalportions a plurality of vibrator bodies 10 with rounded end extensions15, will be formed. Each vibra tor body is then bored out to form thecylinder 11,,andtheends of the cylinder are tapped forthe reception ofthe caps or plugs 12,13. The socket 24, is drilled in theportion'lO ofthe body and the ducts 25,26, 33,

34 are formed by drilling the part 10 from the respective ends. Thedrill holes are .on

l ag slant' so that: while thedrill may be set {off by the connectingpipe or its equivalent whenthesame is screwed into the socket to asufficient extent tosecure it firmly in place. The several ports in thecylinderwall are formed by drilling the walls 10 10 transversely, and inthe part 10 the drilled holes for both ports and ducts are partiallyplugged up in such a manner as to provide the described'passages orcommunications, as indicated by the dotted lines in Fig. 3.

The vibrator body isof such form. that it can beevenly tempered withoutdifficulty, and I prefer to harden the vibrator in this manner. 'Thedevice can be very accurately constructed so as to be economical inconsumption, of air and powerful. in action. Furthermore-my improvedvibrator while very. serviceable and durable, can be pro-, duced at verylow cost by the use of commer' cial bar stock and of the automaticmachinery to, whichsuch stock is well'adapted. it

wall ofthe bore; substantially as described.

2 The method of making a vibrator body which comprises drilling alongitudinal bore eccentrically through apolygonal bar, cutt ng away aportion-of the ends of the bar to produce shoulders, drilling intakeports in the thicker wall of the bore throughsaid shoulders, and formingexhaust ports in the thinner wall of the bore; substantially asdescribed.

3. The method of makings vibrator body which comprises drillingalengthwise bore .eccentrlcally through. a polygonal bar,

rounding off the'ends/of the bar to form reduced extensions, anddrilling intake passages, inthe thicker wall of the bore from theextremities of the polygonal body portion which are adjacent the roundedoff ends.

4. The method of making avibrator body which comprises cutting a lengthof metal from a commercial bar, drilling a longitiu dinal boreeccentrically through said length of metal so that the resulting body isthicker at one side than at the other, drilling intake passages in thethicker'wall of the body, and drilling exhaust passages in thethinnerwall of the body; substantially as described.

5. The method of making a vibrator body,

which comprises cutting a length of metal from acommercial bar ofuniformcrosssection, reducing the diameter of the end portions of suchlength of metal so as to form shoulders, drilling a longitudinal borethrough such length of metal from end to end, drilling inlet passages inthe wall of the body at one side, from the aforesaid shoulders, anddrilling an intermediate inlet socket With Which said passagescommunicate; substantially as described.

6. The method of making vibrator bodies, which comprises turning down acommercial bar at different points in the length thereof to createreduced rounded portions at different points, dividing the bar into aplurality of lengths by cutting through each of the reduced roundedportions so that a plurality of bodies are formed having reduced roundedends and adjacent shoulders, drilling a longitudinal bore through eachbody, and drilling passages in the Wall of the body from the shouldersadjacent the reduced end portions; substantially as described.

7. The method of making vibrator bodies, which comprises reducing apolygonal bar Copies of this patent may be obtained. for five cents atdifferent points in its length to create eccentric rounded portionstherein, dividing the bar into a plurality of lengths by cutting througheach of said eccentric rounded portions so that aplurality of polygonalbodies are formed having reduced rounded ends, drilling a longitudinalbore through each body concentrically With the eccentric rounded ends,drilling inlet passages in the thicker Wall of thebore, and drillingexhaust passages in thethinner Wall of the bore; substantially asdescribed.

8. The method of making a vibrator body from commercial bar stock, Whichcomprises cutting a length of metal from a commercial bar of uniformcross section, cutting away a portion of the ends of the bar to formshoulders, drilling a longitudinal bore eccentrically through suchlength of metal to produce opposite Walls of unequal thickness, drillinginlet passages in the thicker Wall of the body from the aforesaidshoulders, and

drilling exhaust ports in the thinner Wall of the bore; substantially asdescribed.

In Witness whereof, I have hereunto set my hand on the th day ofDecember, 1916.

GEORGE B. PIOKOP.

each, by addressing the Commissioner of Patents,

Washington, D. G.

